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artcher [175]
3 years ago
8

7. Un niño tiene 35 kg esta sobre un trineo que tiene una masa de 5 kg. Si el niño y el trineo

Physics
1 answer:
FrozenT [24]3 years ago
7 0

Answer:

<em>El niño y el trineo se mueven a 3.61 m/s</em>

Explanation:

<em><u>Energía Cinética</u></em>

Un cuerpo de masa m que se mueve con rapidez v, posee una energía cinética de:

\displaystyle K =\frac{1}{2}mv^2

Se nos dice que un niño de 35 Kg está sobre un trineo de 5 Kg y ambos viajan juntos. La masa total del conjunto es m=40 Kg.

Además sabemos que su energía cinética es de 260 J y requerimos calcular su velocidad.

Eso lo haremos despejando v de la ecuación anterior:

\displaystyle v =\sqrt{\frac{2K}{m}}

\displaystyle v =\sqrt{\frac{2*260}{40}}

\displaystyle v =\sqrt{13}

v = 3.61 m/s

El niño y el trineo se mueven a 3.61 m/s

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